I don't know about disappearing for days and weeks, but as a manager I can say that in practice, performance problems are often subtle and hard to detect.
I don't subscribe to the idea that you have to be at your desk to get work done, and I do my own best work usually hiding away somewhere quiet. However, with the middle- to low-performers, I admit it's disquieting to suspect that some people are working only an hour a day, but I have no way to confirm.
I don't subscribe to the idea that you have to be at your desk to get work done, and I do my own best work usually hiding away somewhere quiet. However, with the middle- to low-performers, I admit it's disquieting to suspect that some people are working only an hour a day, but I have no way to confirm.